TS4997IQT STMicroelectronics, TS4997IQT Datasheet - Page 28

• Manufacturer Part Number: TS4997IQT
• Description: IC AMP AUDIO 1W STER AB 16QFN
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS4997IQT

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 1W x 2 @ 8 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: 3D, Depop, Differential Inputs, Standby, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5995-2

Application information
4.14
28/34
Figure 67. Typical single-ended input application
The component calculations remain the same for the gain. In single-ended input
configuration, the formula is:
with R
Notes on PSRR measurement
What is the PSRR?
The PSRR is the power supply rejection ratio. The PSRR of a device is the ratio between a
power supply disturbance and the result on the output. In other words, the PSRR is the
ability of a device to minimize the impact of power supply disturbance to the output.
How is the PSRR measured?
The PSRR is measured as shown in
IN
Diff. input L-
Diff. input R-
expressed in kΩ .
P1
P2
Cin1
330nF
Cin2
330nF
Cin3
330nF
Cin4
330nF
Rin1
24k
Rin2
24k
Rin3
24k
Rin4
24k
1uF
Cb
14
1
2
4
3
Av
TS4997 - QFN16
LI N-
LI N+
RIN-
RIN+
SE
Bypass
=
RIGHT
V
------------------------- -
LEFT
Figure
O+
GND
V
BIAS
–
e
V
GND
O-
68.
EFFECT
=
3D
R
------------- -
R
feed
IN
=
STBY
50kΩ
------------- -
-
+
-
+
R
VCC
Vcc
IN
Cs
1uF
LOUT-
LOUT+
ROUT-
ROUT+
12
11
9
10
Left Speaker
Right Speaker
8 Ohms
8 Ohms
TS4997